Dissolvable material application in perforating
A shaped charge includes a charge case; a liner; an explosive retained between the charge case and the liner; and a primer core disposed in a hole in the charge case and in contact with the explosive, wherein at least one of the case, the liner, the primer core, and the explosive comprising a material soluble in a selected fluid. A perforation system includes a perforation gun, comprising a gun housing that includes a safety valve or a firing valve, wherein the safety valve or the firing valve comprises a material soluble in a selected fluid.
1. A method for perforating a formation, comprising:
lowering a perforating gun into a wellbore;
detonating a shaped charge in the perforation gun, wherein the shaped charge comprises:
a charge case,
a liner:
an explosive retained between the charge case and the liner; and
a primer core disposed in a hole in the charge case and in contact with the explosive,
wherein at least one of the case, the liner, the primer core, and the explosive comprises a material soluble in a selected fluid, and wherein the liner comprises the material soluble in the selected fluid and a high density material.
2. The method of claim 1 wherein the perforating gun includes a plurality of shaped charges.
3. The method of claim 2 wherein the plurality of shaped charges are phased to fire in multiple directions from the perforating gun.
4. The method of claim 1 wherein the explosive is selected from the group consisting of cyclotrimethylenetrinitramine, hexahydro-1,3,5-trinitro-1,3,5-triazine, cyclotetramethylenetetranitramine, 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane, triaminotrinitrobenzene and hexanitrostilbene.
5. The method of claim 1 wherein the shaped charge further includes an O-Ring seal.
6. The method of claim 1 wherein the shaped charge further includes a crimping ring seal.
7. The method of claim 1 wherein the material soluble in the selected fluid comprises reactive non-particles reactive with the explosive upon detonation.
8. The method of claim 1 wherein the selected fluid includes water.
9. The method of claim 1 wherein the selected fluid is selected from the group consisting of hydrocarbons, water, water-based drilling fluids and hydrocarbon-based drilling fluids.
10. The method of 1 wherein the soluble material is a dissolvable material.
11. The method of claim 10 wherein the dissolvable material is a powdered metal.
12. The method of claim 11 wherein the powdered metal is selected from the group consisting of iron, magnesium, zinc, aluminum, alloys thereof and combinations thereof.
13. The method of claim 10 wherein the dissolvable material is selected from the group consisting of polyolefin polymers, paraffin waxes, polyalkylene oxides, polyalkylene glycols, polylactide (“PLA”) polymer, polyglycolic acid; polycaprolactams, mixtures of PLA polymer and polyglycolic acid, sulfamic acid, trichloroacetic acid and citric acid.
14. The method of claim 10 wherein the dissolvable material degrades over a period of one hour to two hundred forty hours.
15. The method of claim 10 wherein the dissolvable material degrades over a period of one hour to forty eight hours.
16. The method of claim 10 wherein the dissolvable material degrades over a period of one hour to twenty four hours.
17. The method of claim 10 wherein the dissolvable material degrades over a temperature range of 50 C to 250 C.
18. The method of claim 10 wherein the dissolvable material degrades over a temperature range of 100 C to 250 C.
19. The method of claim 10 wherein the dissolvable material degrades over a temperature range of 150 C to 250 C.